Diurnal variation of PEF and its use in epidemiological studies.
Eur Respir J Suppl
; 24: 49S-56S, 1997 Feb.
Article
em En
| MEDLINE
| ID: mdl-9098711
ABSTRACT
Diurnal variability in peak expiratory flow (PEF) has been an accepted clinical method in the management of asthma and the evaluation of occupational asthma. In this paper, the basis for this usage together with other clinical and epidemiological applications is discussed. The measured characteristics of PEF diurnal variability are described in asthmatics and asymptomatic subjects, showing the greater variability in asthmatics, and the "morning dip" related to circadian rhythm. PEF measured by pneumotachograph and the mini-Wright meter are shown to be in good agreement, but PEF measured by the latter and other small PEF meters is different in terms of absolute values, and both intraindividual variability within test sets and diurnally. The use of PEF meters, and the daily diaries in which the subject or patient records PEF and related factors are described.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Asma
/
Pico do Fluxo Expiratório
/
Ritmo Circadiano
Tipo de estudo:
Clinical_trials
/
Diagnostic_studies
Limite:
Adolescent
/
Adult
/
Aged
/
Child
/
Female
/
Humans
/
Male
/
Middle aged
País/Região como assunto:
America do norte
Idioma:
En
Revista:
Eur Respir J Suppl
Ano de publicação:
1997
Tipo de documento:
Article
País de afiliação:
Estados Unidos